Database : MEDLINE
Search on : B01.650.940.800.575.912.250.859.937.055 [DeCS Category]
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  1 / 18 MEDLINE  
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PMID:28170425
Author:Yang MQ; Li DZ; Wen J; Yi TS
Address:Germplasm Bank of Wild Species, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming, Yunnan, China.
Title:Phylogeny and biogeography of the amphi-Pacific genus Aphananthe.
Source:PLoS One; 12(2):e0171405, 2017.
ISSN:1932-6203
Country of publication:United States
Language:eng
Abstract:Aphananthe is a small genus of five species showing an intriguing amphi-Pacific distribution in eastern, southern and southeastern Asia, Australia, and Mexico, also with one species in Madagascar. The phylogenetic relationships of Aphananthe were reconstructed with two nuclear (ITS & ETS) and two plastid (psbA-trnH & trnL-trnF) regions. Clade divergence times were estimated with a Bayesian approach, and the ancestral areas were inferred using the dispersal-extinction-cladogenesis and Bayesian Binary MCMC analyses. Aphananthe was supported to be monophyletic, with the eastern Asian A. aspera resolved as sister to a clade of the remaining four species. Aphananthe was inferred to have originated in the Late Cretaceous (71.5 mya, with 95% HPD: 66.6-81.3 mya), and the crown age of the genus was dated to be in the early Miocene (19.1 mya, with 95% HPD: 12.4-28.9 mya). The fossil record indicates that Aphananthe was present in the high latitude thermophilic forests in the early Tertiary, and experienced extinctions from the middle Tertiary onwards. Aphananthe originated in Europe based on the inference that included fossil and extant species, but eastern Asia was estimated to be the ancestral area of the clade of the extant species of Aphananthe. Both the West Gondwanan vicariance hypothesis and the boreotropics hypothesis could be excluded as explanation for its amphi-Pacific distribution. Long-distance dispersals out of eastern Asia into North America, southern and southeastern Asia and Australia, and Madagascar during the Miocene account for its wide intercontinental disjunct distribution.
Publication type:JOURNAL ARTICLE
Name of substance:0 (DNA, Intergenic)


  2 / 18 MEDLINE  
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PMID:27160259
Author:Diaz-Lara A; Gent DH; Martin RR
Address:Department of Botany and Plant Pathology, Oregon State University, Corvallis, Oreg., USA.
Title:Identification of Extrachromosomal Circular DNA in Hop via Rolling Circle Amplification.
Source:Cytogenet Genome Res; 148(2-3):237-40, 2016.
ISSN:1424-859X
Country of publication:Switzerland
Language:eng
Abstract:During a survey for new viruses affecting hop plants, a circular DNA molecule was identified via rolling circle amplification (RCA) and later characterized. A small region of the 5.7-kb long molecule aligned with a microsatellite region in the Humulus lupulus genome, and no coding sequence was identified. Sequence analysis and literature review suggest that the small DNA molecule is an extranuclear DNA element, specifically, an extrachromosomal circular DNA (eccDNA), and its presence was confirmed by electron microscopy. This work is the first report of eccDNAs in the family Cannabaceae. Additionally, this work highlights the advantages of using RCA to study extrachromosomal DNA in higher plants.
Publication type:JOURNAL ARTICLE
Name of substance:0 (DNA, Circular); 0 (DNA, Plant)


  3 / 18 MEDLINE  
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PMID:26739110
Author:Akin D; Durak Y; Uysal A; Gunes E; Aladag MO
Address:a Meram Faculty of Medicine, Department of Anatomy , Necmettin Erbakan University , Konya , Turkey .
Title:Assessment of antimutagenic action of Celtis glabrata Steven ex Planch. (Cannabaceae) extracts against base pair exchange and frame shift mutations on Salmonella typhimurium TA98 and TA100 strains by Ames test.
Source:Drug Chem Toxicol; 39(3):312-21, 2016.
ISSN:1525-6014
Country of publication:England
Language:eng
Abstract:CONTEXT: Celtis glabrata is used in Turkey for the treatment of various health disorders. OBJECTIVE: The acetone, chloroform, ethanol, and methanol extracts of C. glabrata leaf, fruit, and seed were investigated to evaluate their antimutagenic activities. MATERIAL AND METHODS: The antimutagenicity of these extracts was determined by Ames test against mutagens (4-nitro-O-phenylenediamine, 2-aminofluorene (2-AF), and sodium azide (SA)). The extracts were used at concentrations between 5 and 0.005 mg/plate. RESULTS: The ethanol extracts of leaves exhibited strong antimutagenicity (70%) against 2-AF with S9 at 5 mg/plate on TA98. But methanol (61%, 53%) and acetone (53%, 52%) also revealed strong inhibition rates at concentrations of ≥ 0.5 mg/plate. Among the extracts, the highest activity (96%) was obtained from acetone extract against SA without S9, followed by chloroform extract (91%) at a dose of 5 mg/plate on TA100 with S9. Ethanol (without S9) and chloroform (with S9) extracts showed strong antimutagenicity at all doses. Exception of chloroform and acetone (without S9), all fruit extracts (with/without S9) manifested strong antimutagenicity at doses of ≥ 0.5 mg/plate on TA98 strain. Ethanol extracts revealed 68% inhibition against 2-AF on TA98. Acetone and ethanol extracts manifested 84% and 82% inhibition against SA on TA100, respectively. All the extracts of seeds revealed strong inhibition against 2-AF at ≥ 0.5 mg/plate doses on TA98, but acetone extract showed excellent antimutagenicity (94%). Moreover, the chloroform (74, 73, 63, 54%), acetone (74, 72, 70, 65%) and methanol (74, 67, 63, 61%) extracts of seeds revealed strong antimutagenic activity on TA100 against SA with S9. DISCUSSION AND CONCLUSION: This plant may be natural source of antimutagenic agents.
Publication type:JOURNAL ARTICLE; RESEARCH SUPPORT, NON-U.S. GOV'T
Name of substance:0 (Antimutagenic Agents); 0 (Mutagens); 0 (Plant Extracts)


  4 / 18 MEDLINE  
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PMID:25756361
Author:Zhou K; Ludwig L; Li SM
Address:Institut für Pharmazeutische Biologie und Biotechnologie, Philipps-Universität Marburg, Marburg 35037, Germany.
Title:Friedel-crafts alkylation of acylphloroglucinols catalyzed by a fungal indole prenyltransferase.
Source:J Nat Prod; 78(4):929-33, 2015 Apr 24.
ISSN:1520-6025
Country of publication:United States
Language:eng
Abstract:Naturally occurring prenylated acylphloroglucinol derivatives are plant metabolites with diverse biological and pharmacological activities. Prenylation of acylphloroglucinols plays an important role in the formation of these intriguing natural products and is catalyzed in plants by membrane-bound enzymes. In this study, we demonstrate the prenylation of such compounds by a soluble fungal prenyltransferase AnaPT involved in the biosynthesis of prenylated indole alkaloids. The observed activities of AnaPT toward these substrates are much higher than that of a microsomal fraction containing an overproduced prenyltransferase from the plant hop.
Publication type:JOURNAL ARTICLE; RESEARCH SUPPORT, NON-U.S. GOV'T
Name of substance:0 (Biological Products); 0 (Indole Alkaloids); 79956-01-7 (Polyketide Synthases); DHD7FFG6YS (Phloroglucinol); EC 2.5.1.1 (Dimethylallyltranstransferase)


  5 / 18 MEDLINE  
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PMID:24872307
Author:Jiang L; An G; Li W; Qiao G
Address:Key Laboratory of Zoological Systematics and Evolution, Institute of Zoology, Chinese Academy of Sciences, Beijing, 100101, China; Email: unknown.
Title:A new Shivaphis species (Hemiptera: Aphididae) on the Chinese endemic plant, Pteroceltis tatarinowii.
Source:Zootaxa; 3753:375-83, 2014 Jan 08.
ISSN:1175-5326
Country of publication:New Zealand
Language:eng
Abstract:A new species of aphid in subfamily Calaphidinae, Shivaphis pteroceltis sp. n., is described from China. This aphid feeds on Pteroceltis tatarinowii, an endemic tree commonly planted as an ornamental in China and used in the production of Xuan paper. The life cycle is described, and the descriptions of fundatrices, apterous and alate viviparae, oviparae and males are provided. COI sequences have been deposited in Genbank, and the type specimens are deposited in the National Zoological Museum of China, Institute of Zoology, Chinese Academy of Sciences, Beijing and Forestry Bureau of Central District, Zaozhuang City, Shandong Province, China.
Publication type:JOURNAL ARTICLE; RESEARCH SUPPORT, NON-U.S. GOV'T
Name of substance:EC 1.9.3.1 (Electron Transport Complex IV)


  6 / 18 MEDLINE  
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PMID:23942084
Author:Angeles G; Lascurain M; Davalos-Sotelo R; Zarate-Morales RP; Ortega-Escalona F
Address:Instituto de Ecología, A.C. Carretera Antigua a Coatepec No. 351. El Haya. Xalapa, Veracruz, C.P. 91070 Mexico. guillermo.angeles@inecol.edu.mx
Title:Anatomical and physical changes in leaves during the production of tamales.
Source:Am J Bot; 100(8):1509-21, 2013 Aug.
ISSN:1537-2197
Country of publication:United States
Language:eng
Abstract:PREMISE OF THE STUDY: Tamale preparation has a long tradition in Mexico. To understand which material properties have been considered important for this purpose throughout the years, a study was conducted of the anatomical, chemical, and mechanical properties of the leaves of four plant species used in tamale preparation in Veracruz, Mexico: Calathea misantlensis, Canna indica, Musa paradisiaca, and Oreopanax capitatus. METHODS: Four cooking treatments were considered: fresh (F), roasted (soasado, R), steamed (S), and roasted plus steamed (R/S). Chemical, anatomical, and mechanical analyses were conducted before and after each treatment. Leaf samples were tested for tensile strength at both parallel and perpendicular orientation relative to the fibers. KEY RESULTS: Musa paradisiaca had the highest proportion of cellulose, while the remaining species shared similar lower proportions. Leaves were stronger and stiffer in the longitudinal direction of the fibers. Musa paradisiaca leaves had higher values of mechanical strength than the other species. The cooking process that most affected the mechanical properties was steaming. CONCLUSIONS: The chemical constituents of the leaves are closely correlated with their physical properties. The treatment that caused the greatest decrease in leaf physical integrity was steaming, while the combination of roasting and steaming showed similar results to those of steaming alone. No evident anatomical changes are produced by any of the treatments. This is one of the few studies comparing physical, chemical, and anatomical characteristics of leaves used for human consumption, before and after cooking.
Publication type:COMPARATIVE STUDY; JOURNAL ARTICLE; RESEARCH SUPPORT, NON-U.S. GOV'T
Name of substance:0 (Polysaccharides); 8024-50-8 (hemicellulose); 9004-34-6 (Cellulose); 9005-53-2 (Lignin)


  7 / 18 MEDLINE  
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PMID:23741336
Author:Svistoonoff S; Benabdoun FM; Nambiar-Veetil M; Imanishi L; Vaissayre V; Cesari S; Diagne N; Hocher V; de Billy F; Bonneau J; Wall L; Ykhlef N; Rosenberg C; Bogusz D; Franche C; Gherbi H
Address:Equipe Rhizogenèse, UMR DIADE (IRD, UM2), Institut de Recherche pour le Développement, Montpellier, France.
Title:The independent acquisition of plant root nitrogen-fixing symbiosis in Fabids recruited the same genetic pathway for nodule organogenesis.
Source:PLoS One; 8(5):e64515, 2013.
ISSN:1932-6203
Country of publication:United States
Language:eng
Abstract:Only species belonging to the Fabid clade, limited to four classes and ten families of Angiosperms, are able to form nitrogen-fixing root nodule symbioses (RNS) with soil bacteria. This concerns plants of the legume family (Fabaceae) and Parasponia (Cannabaceae) associated with the Gram-negative proteobacteria collectively called rhizobia and actinorhizal plants associated with the Gram-positive actinomycetes of the genus Frankia. Calcium and calmodulin-dependent protein kinase (CCaMK) is a key component of the common signaling pathway leading to both rhizobial and arbuscular mycorrhizal symbioses (AM) and plays a central role in cross-signaling between root nodule organogenesis and infection processes. Here, we show that CCaMK is also needed for successful actinorhiza formation and interaction with AM fungi in the actinorhizal tree Casuarina glauca and is also able to restore both nodulation and AM symbioses in a Medicago truncatula ccamk mutant. Besides, we expressed auto-active CgCCaMK lacking the auto-inhibitory/CaM domain in two actinorhizal species: C. glauca (Casuarinaceae), which develops an intracellular infection pathway, and Discaria trinervis (Rhamnaceae) which is characterized by an ancestral intercellular infection mechanism. In both species, we found induction of nodulation independent of Frankia similar to response to the activation of CCaMK in the rhizobia-legume symbiosis and conclude that the regulation of actinorhiza organogenesis is conserved regardless of the infection mode. It has been suggested that rhizobial and actinorhizal symbioses originated from a common ancestor with several independent evolutionary origins. Our findings are consistent with the recruitment of a similar genetic pathway governing rhizobial and Frankia nodule organogenesis.
Publication type:JOURNAL ARTICLE; RESEARCH SUPPORT, NON-U.S. GOV'T
Name of substance:0 (Bacterial Proteins); 0 (Plant Proteins); EC 2.7.11.17 (Calcium-Calmodulin-Dependent Protein Kinase Kinase)


  8 / 18 MEDLINE  
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PMID:22668002
Author:Op den Camp RH; Polone E; Fedorova E; Roelofsen W; Squartini A; Op den Camp HJ; Bisseling T; Geurts R
Address:Department of Plant Sciences, Wageningen University, Wageningen, The Netherlands.
Title:Nonlegume Parasponia andersonii deploys a broad rhizobium host range strategy resulting in largely variable symbiotic effectiveness.
Source:Mol Plant Microbe Interact; 25(7):954-63, 2012 Jul.
ISSN:0894-0282
Country of publication:United States
Language:eng
Abstract:The non-legume genus Parasponia has evolved the rhizobium symbiosis independent from legumes and has done so only recently. We aim to study the promiscuity of such newly evolved symbiotic engagement and determine the symbiotic effectiveness of infecting rhizobium species. It was found that Parasponia andersonii can be nodulated by a broad range of rhizobia belonging to four different genera, and therefore, we conclude that this non-legume is highly promiscuous for rhizobial engagement. A possible drawback of this high promiscuity is that low-efficient strains can infect nodules as well. The strains identified displayed a range in nitrogen-fixation effectiveness, including a very inefficient rhizobium species, Rhizobium tropici WUR1. Because this species is able to make effective nodules on two different legume species, it suggests that the ineffectiveness of P. andersonii nodules is the result of the incompatibility between both partners. In P. andersonii nodules, rhizobia of this strain become embedded in a dense matrix but remain vital. This suggests that sanctions or genetic control against underperforming microsymbionts may not be effective in Parasponia spp. Therefore, we argue that the Parasponia-rhizobium symbiosis is a delicate balance between mutual benefits and parasitic colonization.
Publication type:JOURNAL ARTICLE; RESEARCH SUPPORT, NON-U.S. GOV'T
Name of substance:0 (RNA, Bacterial); 0 (RNA, Ribosomal, 16S)


  9 / 18 MEDLINE  
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PMID:22484518
Author:Song U; Mun S; Ho CH; Lee EJ
Address:School of Biological Sciences, Seoul National University, Korea.
Title:Responses of two invasive plants under various microclimate conditions in the Seoul metropolitan region.
Source:Environ Manage; 49(6):1238-46, 2012 Jun.
ISSN:1432-1009
Country of publication:United States
Language:eng
Abstract:The possible consequences of global warming on plant communities and ecosystems have wide-ranging ramifications. We examined how environmental change affects plant growth as a function of the variations in the microclimate along an urban-suburban climate gradient for two allergy-inducing, invasive plants, Humulus japonicus and Ambrosia artemisiifolia var. elatior. The environmental factors and plant growth responses were measured at two urban sites (Gangbuk and Seongbuk) and two suburban sites (Goyang and Incheon) around Seoul, South Korea. The mean temperatures and CO(2) concentrations differed significantly between the urban (14.8 °C and 439 ppm CO(2)) and suburban (13.0 °C and 427 ppm CO(2)) sites. The soil moisture and nitrogen contents of the suburban sites were higher than those at the urban sites, especially for the Goyang site. The two invasive plants showed significantly higher biomasses and nitrogen contents at the two urban sites. We conducted experiments in a greenhouse to confirm the responses of the plants to increased temperatures, and we found consistently higher growth rates under conditions of higher temperatures. Because we controlled the other factors, the better performance of the two invasive plants appears to be primarily attributable to their responses to temperature. Our study demonstrates that even small temperature changes in the environment can confer significant competitive advantages to invasive species. As habitats become urbanized and warmer, these invasive plants should be able to displace native species, which will adversely affect people living in these areas.
Publication type:JOURNAL ARTICLE; RESEARCH SUPPORT, NON-U.S. GOV'T


  10 / 18 MEDLINE  
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PMID:22391601
Author:Al-Taweel AM; Perveen S; El-Shafae AM; Fawzy GA; Malik A; Afza N; Iqbal L; Latif M
Address:Department of Pharmacogonosy, College of Pharmacy, King Saud University, Riyadh, P.O. Box 2457, Riyadh 11451, Saudi Arabia.
Title:Bioactive phenolic amides from Celtis africana.
Source:Molecules; 17(3):2675-82, 2012 Mar 05.
ISSN:1420-3049
Country of publication:Switzerland
Language:eng
Abstract:Nine compounds have been isolated for the first time from Celtis africana, namely trans-N-coumaroyltyramine (1), trans-N-feruloyltyramine (2), trans-N-caffeoyltyramine (3), lauric acid (4), oleic acid (5), palmitic acid (6), lupeol (7), ß-sitosterol (8) and oleanolic acid (9), respectively. Their structures have been elucidated by different spectroscopic techniques. The isolated compounds were screened for their antioxidant, anti-inflammatory and acetylcholinestrease enzyme inhibitory activities. Compounds 1-3 showed significant antioxidant and anti-inflammatory activities and weak to moderate acetylcholinestrease enzyme inhibition activity.
Publication type:JOURNAL ARTICLE; RESEARCH SUPPORT, NON-U.S. GOV'T
Name of substance:0 (Amines); 0 (Cholinesterase Inhibitors); 0 (Fatty Acids); 0 (Free Radical Scavengers); 0 (Pentacyclic Triterpenes); 0 (Phenols); 0 (Plant Extracts); 0 (Sitosterols); 5LI01C78DD (gamma-sitosterol); 6SMK8R7TGJ (Oleanolic Acid); 9000-07-1 (Carrageenan); O268W13H3O (lupeol)



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